<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<input id ="inputId" type="text" value=""><br/>
		<button onclick="clickMe()">点我</button>
		
		<script  type="text/javascript">
			function clicjMe(){
				console.log('clickMe');
				var input = doucument.getElementById('inputId');//查找,返回var input
			}
		</script>
	</body>
</html>